Pulsed DC Transformer with Embedded Magnets

[chrisC]

on & on it goes..and Tseung STILL doesnt produce any "Watts IN - Watts OUT" numbers.....only voltage 

He likes blinking LEDs. Those things show him he has O.U!

cheers
chrisC

[rave154]

damn.... 1KW worth of blinking LED's....thats a lot.

[Hope]

Any one think we can adapt a cheap laser audio microphone to use to attach our equipment so we don't detune the circuit while we find resonance?  It doesn't have to just connect scope probes, we may be able to just connect directly to our sound card and use software equipment.
http://www.sillanumsoft.org/download.htm  VA is the best free (maybe paid too) package.  Thankx to the member who mentioned it to the forum.
After all this new knowledge has been shared we may realize insights reviewing the old masters again, I am starting with Ed then maybe I can get more from Cletus's replys.   I must go back and understand his math.   Cletus where did you find your math training?

[XS-NRG]

Virtins is very good.
http://virtins.com/

47 Days Lawrence

[ltseung888]

A non-blinking FLEET configuration

One of the requests was to produce a FLEET light that has a number of LEDs that can last for days with 1 rechargeable AA battery.  The battery may be recharged via Solar Panel or by human muscle.

Such a configuration may be achieved with a RMB50 commercial Toroid configured as a Joule Thief Transformer.  The frequency was tuned to 38 Hz.  The experiment was done with the DC Power Supply as power source which provided reproducible results.  A rechargeable AA battery will be used to see how long the lighting can continue.

Focusing on the GEX-50 Toroid

The question was â€" can the GEX-50 toroid configured as a Joule Thief lighting 12 LEDs on a AA battery last 6 hours?  If so, we may be able to use solar or hand muscle to recharge the battery as the proposed reading light.

The answer â€" possible.  The tuning can be on the Joule Thief side â€" a 100 microfarad capacitor was placed in parallel across a 1000 ohm variable resistor.  The frequency can then be tuned.  In our particular case, the Output Frequency was tuned to approximately 60 Hz.

The way we used to obtain Input Power â€" measuring the Instantaneous voltage across a One Ohm resistor to get the instantaneous current value failed to work because the value was too low.  It can be seen from the graph that the idle time was too long between input pulses.